Corrosion causing Immersion Heater problems too quick? Why not try a removable core heater.
What are they?
Imagine a standard immersion heater – a bundle of heating elements submerged directly into a liquid. Now, imagine being able to withdraw those heating elements as a single unit without draining the tank. That, in a nutshell, is the core advantage of a removable core immersion heater.
In this configuration, instead of elements being permanently fixed within a flange, they are instead housed in a protective sheath that remains constantly immersed in the fluid. The heating elements themselves are mounted on a removable bung that slides in and out of this sheath, making replacements quick and easy!
Not only is it a useful tool for minimal downtime during replacement, a removable core Immersion heaters provide special protection for the heating elements inside your immersion heater. We create that extra layer of protection by manufacturing an external stainless steel tube and attaching it to the brass Immersion Head.

FIRC – FAY INDUSTRIAL REMOVABLE CORE HEATERS

Our FI range of immersion heaters are already relied upon for their quality and robust design. With a strong foundation for design, our removable core product range provides an extra layer of protection paired with minimal downtime for internal replacement heating elements.
Why use them?
Removable Core Immersion Heaters: Easy Maintenance, No Draining Needed
We recommend this range for applications where you can’t easily drain the vessel. These heaters transfer heat to the liquid using removable heating elements within a carrier tube, allowing you to replace them without draining the system.
Automatic control can be achieved by fitting a thermostat into the
integral pocket.
Ideal Applications
Removable core immersion heaters perfectly fit industries that require continuous operation, minimal disruption, and efficient maintenance. Some common applications include:
- Chemical Processing: Heating corrosive chemicals, reaction vessels.
- Petrochemical Industry: Oil and gas heating, process fluid temperature control.
- Water Treatment: Heating tanks for purification, sterilization, or anti-icing.
- Food & Beverage: Maintaining temperatures in large vats and processing tanks.
- Pharmaceutical Manufacturing: Ensuring precise temperature control for sensitive processes.
- Manufacturing & Industrial Processes: Any application requiring the heating of large volumes of liquid with an emphasis on uptime.
Is a Removable Core Heater Right for You?
If your industrial process relies heavily on liquid heating and you’re looking for ways to optimize efficiency, reduce operational costs, and streamline maintenance, then a removable core immersion heater is certainly worth exploring.
Get in touch with our team today for more information on our range.



